The slope of the line in the graph is 1.
How to find the slope of this line?
A linear equation in the slope-intercept form is written as:
y = ax + b
a is the slope, b is the y-intercept.
If a line passes through two points (x₁, y₁) and (x₂. y₂), then the slope is:
a = (y₂ - y₁)/(x₂ - x₁)
Here we can see the two points (0, -4) and (4, 0).
Then the slope is:
a = (0 + 4)/(4 - 0) = 1